To analyze the facial patterns of obstructive sleep apnea syndrome (OSAS) p
atients, we took lateral cephalograms of 31 OSAS patients and 26 non-OSAS c
ontrols and utilized Ricketts' method. In addition, we measured the hyoid b
one position, the length of mandibular plane to H-point, the length of soft
palate, and lower pharynx. The facial patterns of OSAS patients were dolic
o, the hyoid bone was positioned low, the soft palate was longer and the wi
dth of the airway was narrower than that of the non-OSAS controls.